ive found the cure: CPropertyPage OnApply

// bool to button state
#ifndef BOOL2BST
#define BOOL2BST(iState,bSet) (iState =( bSet ? BST_CHECKED : BST_UNCHECKED ) )
#endif

#ifndef BST2BOOL
#define BST2BOOL(iState,bSet) ( bSet = ( iState == BST_CHECKED ) )
#endif

class COptionsDlgPage: public CPropertyPageImpl<COptionsDlgPage>,
    public CWinDataExchange<COptionsDlgPage>
{
    typedef CPropertyPageImpl<COptionsDlgPage> _baseClass;
public:
    //DECLARE_WND_CLASS(_T("NO5OptionsDlg"));
    bool m_bAllowCTCP;
    int m_iAllowCTCP;
public:
    COptionsDlgPage():_baseClass(_T("General"))
    {
        m_bAllowCTCP = false;
        m_iAllowCTCP = BST_UNCHECKED;
        //BOOL2BST(m_iAllowCTCP,m_bAllowCTCP);
    }

    enum { IDD = IDD_PROPPAGE_SMALL };

    BEGIN_DDX_MAP(COptionsDlgPage)
        DDX_CHECK(IDC_CHECK1,m_iAllowCTCP)
    END_DDX_MAP()

    BEGIN_MSG_MAP(COptionsDlg)
        MESSAGE_HANDLER(WM_INITDIALOG, OnInitDialog)
        COMMAND_ID_HANDLER(IDC_CHECK1, OnCheck)
        //FORWARD_NOTIFICATIONS();
        CHAIN_MSG_MAP(_baseClass)
        //CHAIN_MSG_MAP(CWinDataExchange<COptionsDlgPage>)
    END_MSG_MAP()
    LRESULT OnInitDialog(UINT, WPARAM, LPARAM, BOOL& bHandled)
    {
        BOOL2BST(m_iAllowCTCP, m_bAllowCTCP);
        DoDataExchange(DDX_LOAD);
        bHandled = FALSE;
        return 0;
    }

    int OnApply()
    {
        DoDataExchange(DDX_SAVE);
        BST2BOOL(m_iAllowCTCP, m_bAllowCTCP);
        return PSNRET_NOERROR;
    }
    LRESULT OnCheck(WORD /*wNotifyCode*/, WORD /*wID*/, HWND /*hWndCtl*/, BOOL& /*bHandled*/)
    {
        SetModified();
        return 0;
    }
};